diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 32570af..5fbca26 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -205,9 +205,9 @@
 				 union power_supply_propval *val)
 {
 	int ret = 0;
-	int16_t ec_word;
+	__be16 ec_word;
 	uint8_t ec_byte;
-	uint64_t ser_buf;
+	__be64 ser_buf;
 
 	ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
 	if (ret)
@@ -257,16 +257,14 @@
 		if (ret)
 			return ret;
 
-		ec_word = be16_to_cpu(ec_word);
-		val->intval = ec_word * 9760L / 32;
+		val->intval = (int)be16_to_cpu(ec_word) * 9760L / 32;
 		break;
 	case POWER_SUPPLY_PROP_CURRENT_AVG:
 		ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2);
 		if (ret)
 			return ret;
 
-		ec_word = be16_to_cpu(ec_word);
-		val->intval = ec_word * 15625L / 120;
+		val->intval = (int)be16_to_cpu(ec_word) * 15625L / 120;
 		break;
 	case POWER_SUPPLY_PROP_CAPACITY:
 		ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
@@ -278,24 +276,22 @@
 		ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
 		if (ret)
 			return ret;
-		ec_word = be16_to_cpu(ec_word);
-		val->intval = ec_word * 100 / 256;
+
+		val->intval = (int)be16_to_cpu(ec_word) * 100 / 256;
 		break;
 	case POWER_SUPPLY_PROP_TEMP_AMBIENT:
 		ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
 		if (ret)
 			return ret;
 
-		ec_word = be16_to_cpu(ec_word);
-		val->intval = ec_word * 100 / 256;
+		val->intval = (int)be16_to_cpu(ec_word) * 100 / 256;
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_COUNTER:
 		ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);
 		if (ret)
 			return ret;
 
-		ec_word = be16_to_cpu(ec_word);
-		val->intval = ec_word * 6250 / 15;
+		val->intval = (int)be16_to_cpu(ec_word) * 6250 / 15;
 		break;
 	case POWER_SUPPLY_PROP_SERIAL_NUMBER:
 		ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);